Argyll and Bute is one of the few four-way marginal constituencies in Britain. The Liberal Democrats have held the seat since 1987, when they took it from the Conservatives and currently, the Conservatives, Labour and the SNP are capable of taking the seat with a small swing of less than 6.3%. The equivalent seat to Argyll and Bute in the Scottish Parliament was lost to the SNP in 2007, and was again taken by the nationalists in 2011.